Pentacarbonylhydridorhenium

Pentacarbonylhydridorhenium is a chemical compound with the formula ReH(CO)₅. This colorless liquid is a weak acid and represents one of the most important derivatives of dirhenium decacarbonyl (Re₂(CO)₁₀). It is synthesized by treating a methanolic solution of bromopentacarbonylrhenium(I) (Re(CO)₅Br) with zinc and acetic acid (HOAc). [1]

Re(CO)₅Br + Zn + HOAc → ReH(CO)₅ + ZnBrOAc

Pentacarbonylhydridorhenium

Names
IUPAC name pentacarbonylhydridorhenium
Identifiers
CAS Number	16457-30-0
3D model (JSmol)	Interactive image
PubChem CID	139031000
InChI InChI=1S/5CO.Re.H/c5*1-2;; Key: CNPMTNYPOCHKNC-UHFFFAOYSA-N InChI=1/5CO.Re.H/c5*1-2;;/rC5HO5Re/c6-1-11(2-7,3-8,4-9)5-10/h11H Key: CNPMTNYPOCHKNC-AUQHHBNCAA
SMILES C(#O)[ReH](C#O)(C#O)(C#O)C#O
Properties
Chemical formula	ReH(CO)5
Molar mass	327.265 g/mol
Appearance	Colorless liquid
Density	2.30 g/mL, liquid
Melting point	12.5 °C (54.5 °F; 285.6 K)
Boiling point	100 °C (212 °F; 373 K) (decomposes)
Solubility in water	Insoluble
Hazards
Main hazards	Flammable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

It is moderately sensitive to light: samples turn yellow due to the formation of the metal cluster Re₃H(CO)₁₄

3 Re(CO)₅H → Re₃H(CO)₁₄ + H₂ + CO

At 100 °C, it decomposes to Re₂(CO)₁₀:[1]

2 Re(CO)₅H → H₂ + Re₂(CO)₁₀

References

1. Michael A. Urbancic, John R. Shapley (1990). "Pentacarbonylhydridorhenium". Inorganic Syntheses. 28: 165–8. doi:10.1002/9780470132593.ch43. ISBN 9780470132593.